Photoinduced diffraction grating in hybrid artificial molecule

Photoinduced diffraction grating is theoretically investigated in a three-level ladder-type hybrid artificial molecule comprised of a semiconductor quantum dot (SQD) and a metal nanoparticle (MNP). The SQD and the MNP are coupled via the Coulomb interaction. The probe absorption vanishes under the a...

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Bibliographic Details
Published inOptics express Vol. 20; no. 2; pp. 1219 - 1229
Main Authors Xiao, Zhi-Hong, Zheng, Li, Lin, HongZhen
Format Journal Article
LanguageEnglish
Published United States 16.01.2012
Subjects
Crystallization
Models, Theoretical
Nanotechnology - instrumentation
Nanotechnology - methods
Optics and Photonics - instrumentation
Optics and Photonics - methods
Quantum Dots
Semiconductors - instrumentation
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Summary:Photoinduced diffraction grating is theoretically investigated in a three-level ladder-type hybrid artificial molecule comprised of a semiconductor quantum dot (SQD) and a metal nanoparticle (MNP). The SQD and the MNP are coupled via the Coulomb interaction. The probe absorption vanishes under the action of a strong coupling field, indicating an effect of electromagnetically induced transparency (EIT). Based on this EIT effect, diffraction grating is achievable when a standing-wave coupling field is applied. It turns out that the efficiency of diffraction grating is greatly improved due to the existence of the MNP. Furthermore, the diffraction efficiency can be controlled by tuning the interaction strength between the SQD and the MNP. Nearly pure phase grating is obtained, showing high transmissivity and high diffraction efficiency up to 33%.
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ISSN:1094-4087
1094-4087
DOI:10.1364/oe.20.001219